Large Eddy Simulations of Turbulent Flows at Supercritical Pressure
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
A12-5 Thermalhydraulics of High Prandtl-Number (Supercritical) Flows (II)

Claus Kunik (Karlsruhe Institute for Technology)
Ivan Otic (Karlsruhe Institute for Technology)
Thomas Schulenberg (Karlsruhe Institute for Technology)


A Large Eddy Simulation (LES) method is used to investigate turbulent heat transfer to CO2

at supercritical pressure for upward flows. At those pressure conditions the fluid undergoes

 strong variations of fluid properties in a certain temperature range, which can lead to a

 deterioration of heat transfer (DHT).


In this analysis, the LES method is applied on turbulent forced convection conditions to

 investigate the influence of several subgrid scale models (SGS-model). At first, only velocity

 profiles of the so-called inflow generator are considered, whereas in the second part

 temperature profiles of the heated section are investigated in detail. The results are statistically

 analyzed and compared with DNS data from the literature [1].


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